Product Overview
The Pentair Admiral S20 84420605 is a heavy-duty automatic pool skimmer designed for concrete pool construction. It features a 2-inch slip connection, flap-style weir, and built-in equalizer configuration for installations where the second skimmer port is connected to the main drain or where equalizer functionality is required.
The Admiral S20 uses a reinforced PVC twin-port base and includes Pentair’s lock-down lid design for secure installation and easy service access. Pentair lists this exact model as the S20 flap-weir, equalizer, 2" slip configuration.
Key Features
- Genuine Pentair Admiral™ S20
- Manufacturer Part Number: 84420605
- Designed for concrete / gunite pools
- 2" slip plumbing connection
- Flap-style weir
- Includes equalizer configuration
- Reinforced PVC twin-port base
- Second port can be used with a main drain connection where appropriate
- Lock-down skimmer lid included
- Round lid design
- Large removable debris basket
- Suitable for residential and applicable commercial pool installations
- Durable PVC construction
- Genuine Pentair OEM complete skimmer
Specifications
| Specification | Details |
|---|---|
| Brand | Pentair |
| Product Line | Admiral™ S20 |
| Part Number | 84420605 |
| Product Type | Complete Pool Skimmer |
| Pool Construction | Concrete / Gunite |
| Plumbing Connection | 2" Slip |
| Weir Type | Flap Weir |
| Equalizer | Yes |
| Base Design | Reinforced Twin-Port |
| Material | PVC |
| Lid Included | Yes |
| Lid Style | Lock-Down |
| Cover Shape | Round |
| Product / Shipping Weight | 12 lb |
| Shipping Dimensions | 11" × 15" × 22.5" |
| UPC / Barcode | 788379625078 |
Reinforced Twin-Port Base
The Admiral S20 incorporates a PVC-reinforced twin-port base.
This configuration provides flexibility when plumbing the skimmer and allows the second port to be used for an equalizer or connected to the main drain depending on the system design.
Equalizer Configuration
The 84420605 includes the equalizer configuration.
Pentair specifically notes that S20 models with an equalizer are appropriate for:
- Installations where the second port connects to the main drain
- Certain commercial pool applications
- Applications requiring an equalizer connection
The equalizer can provide an alternate water source to the skimmer when pool water level falls below normal skimming range.
Flap-Style Weir
This model uses Pentair’s flap weir.
The weir helps:
- Improve surface-skimming action
- Direct leaves and floating debris into the basket
- Reduce the tendency for debris to float back into the pool when the pump shuts off
The replacement flap weir used in the Admiral S20 family is Pentair 85001500.
Lock-Down Lid
The Admiral S20 includes a lock-down lid, helping keep the skimmer cover properly positioned while still allowing access for basket cleaning and maintenance.
Pentair also offers replaceable lid and ring components for the S20 system.
Common Replacement Parts
| Part Number | Description |
|---|---|
| 85007400 | Lock-Down Lid |
| 85000600 | 9" Ring Seat |
| 85001500 | Flap Weir |
| 85014500 | Skimmer Basket |
| 85002000 | Ball Valve Assembly |
| 85002200 | Equalizer Tube |
| 85002600 | Vari-Flo Control Insert |
| 85015200 | Equalizer Assembly |
These components are identified in Pentair’s current Admiral S20 parts documentation.
84420605 vs. Similar Admiral S20 Models
| Part Number | Connection | Weir | Equalizer |
|---|---|---|---|
| 84420605 | 2" Slip | Flap | Yes |
| 84420505 | 2" Slip | Circular | Yes |
| 84420805 | 2" Slip | Flap | No |
| 84420405 | 1-1/2" Slip | Flap | No |
| 84420630 | 2" Threaded | Flap | Yes |
Pentair lists these as separate S20 configurations, so matching the plumbing style and equalizer requirement is important before ordering.
Frequently Asked Questions
What is Pentair 84420605?
It is a Pentair Admiral S20 complete skimmer with a flap weir, equalizer, and 2-inch slip plumbing connection.
Is this for concrete pools?
Yes. Pentair lists the Admiral S20 configuration for concrete pool construction.
What size plumbing does it use?
2-inch slip.
Does it include an equalizer?
Yes.
Does it have a flap weir or circular weir?
This model has a flap weir.
Does it include the lid?
Yes. Pentair lists the lock-down lid as included.
Can the second port connect to the main drain?
Yes. Pentair specifically states that S20 equalizer versions may be used where the second port is connected to the main drain.